1Fe3+ + SCN– FeSCN2+ KSCN = colourless, Fe(NO3)3 = colourless mixed = brown, red, rusty, etc. ,FeSCN2+ provides the colourDarker brown , (more SCN–)shift right (toward FeSCN2+)3- Darker brown , (more Fe3+)4- Lighter brown , (less Fe3+)shift left (away from FeSCN2+)11. None (they are all the same) ,Only temperature changes Kc12/10/99
2Equilibrium Lab 12 Fe3+ SCN– FeSCN2+ SCN– = None* 12/10/9912 Fe3+ SCN– FeSCN2+ SCN– = None* Fe3+ = Na2HPO4** Fe3+ = Fe(NO3)3****(With SCN–, only a SCN– will reestablish equilibrium. None of these chemicals work. (addition of Na2HPO4 can decrease FeSCN2+ to its original [ ], but not the others).**Fe3+ has been increased. The only way to reestablish equilibrium is to decrease Fe3+.***Fe3+ has decreased. The only way to reestablish equilibrium is to increase Fe3+.
3For more lessons, visit www.chalkbored.com The Haber process12/10/99A second application of Le chatelier’s principle (film = 10 min)For more lessons, visit